The coal preparation of magnet mineral powder needs the control of technical index

1, the content of magnetic material should reach more than 95%;

2, the true density of magnet mineral powder should reach 4.5kg/cm 3;

3. In the particle size composition of magnet powder, the content of particle size less than 0.045mm should be higher than 85%;

4, inclined wheel (or vertical wheel) heavy medium separator for coal selection of magnet powder, particle size less than 0.075mm content should reach more than 90%.